Last name ムイ (Mui 
, ムイ 
) , globally, is a common cognomen. The cognomen ムイ is habitual in Macao, where it is quite a common surname, Malaysia, and Hong Kong (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in Malaysia, Hong Kong, and the United States. Likewise, ムイ is the forename as well as the last name.